Hostage (Crusader Kings 2)

As far as I know - no way. To take hostage during the war with the victory in the battle with one of the commanders of the troops (the mayor,the priest or the Governor, depending on who was appointed to this position), but they can only release or ransom. You can still take on the child's education and that it will be considered hostage if you attempt to declare war, but they are unlikely to agree. The easiest way to newsmit the war is to marry the heirs to the two factions.

Who knows how the ID of the provinces to know which team? I'm just HOFI4 used to the team tdebug or like in EU4 debug_mode and how this works?